I've wanted something like this myself. I dislike using `--open`
because I tend to move up to re-run my `cargo doc` run but then have to
edit it to remove `--open`.
Also makes it annoying when opening docs when `cargo doc` is wrapped by
a tool like `make`.
This was previously attempted in #5592:
- Unlike the request in #5562, this aligns with #5592 in always printing
rather than using a flag as this seems generally useful
- Unlike #5592, this prints as an alternative to "Opening" to keep
things light
- Unlike #5592, this prints afterwards as the link is only valid then
Fixes#5562
There are some cases where `cargo doc` will try to document two things
with the same crate_name. This attempts to automatically remove some of
those duplicates based on some rules:
- Prefers dependencies for the target over dependencies for the host
(such as proc-macros).
- Prefers the "newest" version if it comes from the same source.
There are still plenty of situations where there can be collisions, but
I'm uncertain on the best way to handle those.
